Locking mechanism



April 1947- A. s. KENDRICK 2,418,180

LOCKING MECHANISM 2 Sheets-Shet 1 Filed Sept. 24, 1945 April 1, 1947- A. s. KENDRICK 2,418,180

LOCKING MECHANISM Filed Sept. 24, 1945 2 Sheets-Sheet 2 "NMiii 6' f5 Jzaz/ en'toz .ffeluiz a]:

Patented Apr. 1, 1947 UNITED STATES PATENT OFFICE.

LOCKING MECHANISM tien of Connecticut Application September 24, 1945, Serial No. 618,083 In Great Britain September 20, 194A 10 Claims.

This invention relates to locking mechanism applicable for example to' the locking of the shackle of a padlock but capable ofapplication to the locking of bars or sliding or rotary members incorporated in mechanism generally.

An object of the invention is to provide an improved and simplified locking device providing a positive locking action of the member until released by the actuation of a key operating element.

As applied to a padlock it is preferred that the locking means according to the invention provides a lock for both the heel and toe of the shackle.

According to the invention the locking means comprises a rotary element or bolt having a part adapted to engage within a slot or lie in the path of a surface of the bar or sliding or rotary member whereby it obstructs the movement of said member, key actuated means being. provided for rotating the element to remove the obstruction.

In its application to the locking of the shackle of a padlock the rotary locking element is preferably provided with locking formations co-.operating with recesses on surfaces on the heel and toe of the shackle.

The invention also consists in a padlock comprising a hinged or spring operated shackle wherein a single bolt is provided, and interengaging means on the bolt and heel and toe of the shackle for deadlocking the shackle.

In the accompanying drawings- Figure 1 is an elevation, partly in section, of a padlock incorporating the invention,

Figure 2 is a perspective view of the lock with the case removed,

Figure 3 is a perspective view of a housing for the locking bolt,

Figure 4 is a perspective view showing the locking bolt and the actuating plug of the lock mechanism,

Figure 5 is an elevation of a padlock shackle and bolt according to a modification,

Figures 6 and 7 are elevations showing the invention applied to a pivoting shackle,

Figures 8 and 9 are elevations of a modified arrangement,

Figures 10 and 11 are views Showing a furinvention to the locking of a pair of displaceable rods.

In carrying the invention into efieot according to one convenient mode by way of example as applied to a padlock in which the shackle has a sliding movement, the toe la and heel lb of the shackle I are provided respectively with slots or recesses 2 and 3 into, which bolt projections l and 5 on a rotary bolt 6 are adapted to engage in th locked position, see Figures 1 and, 2. The. rotary bolt 6 is located within a housing 1 which is riveted or otherwise secured to the cylinder body 8.

Rotation of the rotary bolt is eiiected by acamor projection 9 on the cylinder plug l0 engaging the edge H, of an opening l2 in the bolt into which opening the cam 9. projects.

Rotation of the boltto the unlocked position causes the tensioning of a torsion spring I3, one end of which is anchored to the bolt by a pin M, the other end being connected to a pin l5, ex tending through slots 1.6. in the bolt and secured to. the bolt housing 7. Pin i5 also locates the bolt axially in the housing, I.

The heel lb of the shackle extends into a recess ll in the cylinder body at the bottom of which a spring 18 is. provided by which the shackle is moved outwardly to the open position when released by the bolt. 6. Outward movement of the. shackle is limited by a bar l9. engaging. a longitudinal slot 2|] in the heel of the shackle. Inward movement of the shackle is limited by th engagement of the toe la with a seating 2| on the cylinder body. The lock case 22 engages. positioning lugs 23 on the cylinder body to which it is. secured by rivets passing through holes in the case, housing and cylinder body.

On rotation of the plug H) by the appropriate key, the rotary bolt 6 is rotated to remove the. projections. d and 5 from the recesses 2 and 3 of the shackle, whereupon the shackle is opened by the spring Hi. When the shackle is returned tov the. locked position, the bolt is rotated the torsion spring is tov bring the projections 4 and 5 into locking engagement with the recesses 2 30 engages a recess 3! in the toe 32 of the shackle and at the opposite end of the bolt provides an obstruction to an abutment 33 on the adjacent heel 34. When the bolt is moved to the unlocking position the abutment 33 is adapted to pass through a groove 35 in the end face of the bolt.

According to a modification, see Figures 8 and 9, a radial tooth 36 may be provided on the pivoted heel of the shackle adapted to engage an axially extending surface or projection 37 on the locking bolt or element when in the locking position. In the unlocked condition the tooth 36 passes through a groove 38 in the end face of the bolt. In order to guard further against shocking the locking bolt into the release position, the bolt 39, Figures and 11, may be provided with a radial projection 40 which in the locked position engages behind a spring loaded plunger 4| mounted on the adjacent end face of the plug 42. In the return movement of the locking bolt the radial projection 49 is adapted to depress the spring loaded plunger 41 to pass the plunger and again become locked.

Instead of the coiled torsion spring, a compression spring 43, see Figure 12, seated partly in a recess 44 in the bolt and in a recess 45 in an adjacent stationary part 46 may be used. Again a feather spring 41, see Figure 13, of hair pin form may engage a flat 47a. on the bolt or a feather spring 48, Figure 14, may be used as a torsion spring, one end being connected to the bolt 49, the other end being connected to a relatively stationary part 50.

According to another arrangement, see Figure 15, the locking bolt may be made in two parts, 5|, 52, one part 5| having a stem 53 around which a spring 54 is coiled. One end of the spring en gages a relatively fixed member while the other engages a lug 55 on another part 52 which is adapted to seat on a squared end 55 of the stem. Instead of a tube for the locking bolt a solid bar having the required end formation may be provided.

The invention is not confined to its application to a padlock but may be utilised in connection with the locking of rods or bars against longitudinal or rotary movement. Thus as illustrated in Figures 16 and 17 a pair of bars 51 and 58 adapted for longitudinal movement, either in the same or in opposite directions, have a rotary locking bolt 59 located therebetween. The bolt is provided with diametrically opposite end projections 60 adapted in its locking position to engage in recesses 6| in the rods. When the bolt 59 is turned to the unlocked position the rods 51, 58 may slide through the spaces between the projections 60.

The bolt may be operated with a key actuated plug as in the preceding examples of the invention and may be provided with spring return means or positively moved to the locking position by the key.

Instead of a common locking bolt for both bars 5'! and 58, independent bolts may be provided.

The invention may also be applied to the deadlocking of rotary members by the arrangement of a rotary bolt element so that the locking'projection or projections thereof may engage in recesses in the rotary member.

I claim:

1. In a lock of the class described, a casing having openings in its upper end for the legs of a sliding shackle, a tubular sleeve rotating in juxtaposed relation to the upper end of said casing and between said shackle legs, lugs formed as integral parts of said sleeve through the cutting of the surface of said sleeve, and notches in each of said shackle legs into which said lugs extend to lock said shackle, the rotation of said sleeve withdrawing said lugs from said notches to release said shackle.

2. In a lock of the class described, a casing having openings in its upper end for the legs of a sliding shackle, a tubular sleeve rotating in juxtaposed relation to the upper end of said casing and between said shackle legs, lugs formed as integral parts of said sleeve through the cutting of the surface of said sleeve, notches in each of said shackle legs into which said lugs extend to lock said shackle, the rotation of said sleeve withdrawing saidlugs from said notches to release said shackle, a key plug rotatable in said casing, and a cam surface on said key plug for rotating said sleeve to release said shackle.

3. In a lock of the class described, a casing having openings in its upper end for the legs of a sliding shackle, a tubular sleeve rotating in an axis transverse to said shackle legs and between. said shackle legs, lugs formed as integral parts of said sleeve through the cutting of the surface of said sleeve, notches in each of said shackle legs into which said lugs extend to lock said shackle, the rotation of said sleeve withdrawin said lu s from said notches to release said shackle, a key plug rotatable in aid casing in an axis parallel to said shackle legs, and a cam surface on said key plug extending into a slot in said sleeve for rotating the sleeve to release said shackle.

4. In a lock of the class described, a casing, a shackle slidable relatively to said casing, a tubular sleeve rotating in said casing and relatively to said shackle, a lug formed as an integral p rt of said sleeve, a notch in said shackle into which said lug extends to lock said shackle, the rotation of said sleeve withdrawing said lug to release said shackle, means fixed to said casing extending into said sleeve through a slot therein, and a torsion spring secured between said means and sleeve to rotate said sleeve into a locking position.

5. In a lock of the class described, a casing, a shackle slidable in said casing, a tubular sleeve rotating in said casing relatively to said shackle, a lug formed as an integral part of said sleeve, a notch in said shackle into which said lug extends to lock said shackle, the rotation of said sleeve withdrawing said lug from said notch to release said shackle, a pin fixed to said casin and extending into said sleeve through a slot therein, a pin extending transversely of said sleeve and fixed thereto, and a torsion spring secured at its ends to said pins to rotate said sleeve into look-- ing position.

6. In a lock of the class described, a casing, a movable'bolt in said casing, a tubular sleeve rotating in said casing, a log formed as an integral part of said sleeve, said bolt having a notch intowhich said lug extends to lock said bolt against movement, the rotation of said sleeve withdrawing said lug from said notch to release said bolt, 3, key plug rotatable in said casing in an axis transverse to the axis of said sleeve, anda cam surface on said key plug extending into a slot in said sleeve for rotating the sleeve to release said bolt.

7. In a lock of the class described, a casin a shackle slidable in said casing, a tubular sleeve rotating in an axis transverse to said shackle, a lug formed as an integral part of said sleeve, said shackle having a notch into which said lug extends to lock said shackle, the rotation of said sleeve withdrawing said lug from said notch to release said shackle, a key plug rotatable in said casing in an axis parallel to said shackle, and a cam surface on said key plug extending into a slot in said sleeve for rotating the sleeve to release said shackle.

8. In a lock of the class described, a casing having openings for the legs of a sliding shackle, a tubular sleeve rotating in said casing and between said shackle legs, lugs formed as integral parts of said sleeve, and notches in each of said shackle legs into which said lugs extend to lock said shackle, the rotation of said sleeve withdrawing said lugs from said notches to release said shackle.

9. In a lock of the class described, a casing having openings for the legs of a sliding shackle, a tubular sleeve rotating in said casing and between said shackle legs, lugs formed as integral parts of said sleeve, notches in each of said shackle legs into which said lugs extend to lock said shackle, the rotation. of said sleeve withdrawing said lugs from said notches to release said shackle, means fixed to said casing extending into said sleeve through a slot therein, a torsion spring secured between said means and sleeve to rotate said sleeve into a locking position, a key-plug rotatable in said casing, and a cam surface on said key plug for rotating said sleeve to release said shackle.

6 10. In a lock of the class described, a casing having openings for the legs of a sliding shackle, a tubular sleeve rotating in said casing and between said shackle legs, lugs formed as integral parts of said sleeve, notches in each of said shackle legs into which said lugs extend to lock said shackle, the rotation of said sleeve withdrawing said lugs from said notches to release said shackle, means fixed to said casing extendin into said sleeve through a slot therein, a torsion spring secured between said means and sleeve to rotate said sleeve into a locking position, a key plug rotatable in said casing, and a cam surface on said key plug extending into a slot in said sleeve for rotating the sleeve to release said shackle.

ALBERT SIDNEY KENDRICK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,487,258 Menger et al. Mar. 18, 1924 1,722,525 Junkunc July 30, 1929 1,986,362 Stone Jan. 1, 1935 2,374,669 Dequick May 1, 1945 1,384,590 Bottone July 12, 1921 615,207 Babcock Nov. 29, 1898 1,793,432 Sczepczenski Feb. 17, 1931 1,248,126 Jensen Nov, 27, 1917 1,262,185 Drew Apr. 9, 1918 FOREIGN PATENTS Number Country Date 333,381 German Feb. 24, 1921 

